US2499736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft refrigeration
Assignee: Individual
•
Filing: 1946-09-06
•
Granted: 1950-03-07
•
Expires: 1966-09-06
Abstract
No abstract record available.
Inventors
- 👤 Kleen Nils Erland Af
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:52
CPC Classifications
F; F25; F25B; F25B23/00; F25B23/006; B; B64; B64D; B64D13/00; B64D13/06; B64D13/08; F25D; F25D3/00; F25D3/005; F28; F28D; F28D15/00; F28D15/02; F28D15/0266; F28D20/00; F28D20/02; Y; Y02; Y02E; Y02E60/00; Y02E60/14; Y10; Y10S; Y10S62/00; Y10S62/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |